A couple brands that I like have been producing flannel over shirts with zippers behind the buttons. It's a design that I've seen from Wings+Horns for a few seasons and Woolrich Woolen Mills specifically this fall. I've actually never really liked the feature that much, but I'm curious to hear your thoughts. I feel like the nature of these shirts is comfortable and cozy and the cool, razor edges of a big zipper kind of take that away. That said, the contrast in a soft material, nice buttons, placket and zipper can be a nice mix when done well. I've never purchased an over shirt with a zipper, but the Wings+Horns version seems to be doing well at Roden Gray. Would you prefer not to have the zipper? Is it just nice looking, unnecessary detail that separates the shirt from the pack or is there an actual functionality to it?